Means for pressing hollow bodies having depressions or cavities at their outer sides.



UNITED sTAtrns @FFIGE.

CARL GEFFERS, OF ERFURT,. GERMANY.

IVEEANS FOR PRESSING HOLLOW BODIES HAVING DEPRESSIONS OR CAVITIES AT THEIR- OUTER SIDES.

Patented Oct. 6, 1908.

Application filed April 9,1906. Serial No. 310,860.

To all whom it mag concern:

Be it known that I, CARL GEFFERS, manufacturer, a subject of the, King of Prussia,

I German Emperor, and residing at Erfurt, in

tions of the hollow body to be produced, which then are, put together, and united.

This mode of manufacture is possible, however, only where there are not required, 1n

the outer side of the hollowbody, depressions or cavities of such adepth, configuratron anil size that th s wouldprevent the respeotlve part frontbemg removed fromthe mold. ,VVhere depressions .or cavities of such a kind are ,necessary the respectivepart must be manufactured in two stages, the

first stage consisting in producing the respectlve part either without any depresslons or cavities at all oronly with such small onesthat do not prevent that part from being removed from the mold; and the other stage consisting in either completely producing the cavities or depressions re uired or dee ening those already made, emp oying specia tools in either case. These modes of procedure are circumstantial as well as troublesome,

because the material when pressed into shape and thus put partially under tension offers a great resistance to any further deformation. My novel means. therefor devised allow of manufacturing'the parts in question for hollow bodies in one stage, and in order to make my invention more clear I refer to the annexed drawings, in which Figure 1 shows by ay of example a vertical longitudinal se'cton through one form of execution of a combined mold and apparatus employed for carryin process.

out my novel Fig, 2 is a vertica AB of Fi ,--"1. v

The molt? proper consists of the matrix a, and the patrix b, the former having the cavity or recess corresponding to the configuration of the part a; of the hollow body to section in line Y I be produced, the other having a projection or kind of stamp of corresponding shape. The problem to be solved is: how to produce depressions of a kind equal or. similar to those shown at h. This is brought about as follows: There is in the matrix a, besides the cavity for the material a, a recess'l contaim,

ing a lever c fulcrumed at, e and having at its free end projections or stamps (1 corresponding to the depressions h, and opposite thereto a roll f adapted to be acted on by a lug. g forming part of the patrix b. When forming the part a: by pressing the patrix 1) into the matrix a, also the depressions h are formed, because at the same time the lever c is turned by the action of the lug 9 upon the roll f, thus forcing the material in front of the stamps (1 into the recesses? provided for these stamps in the patrix b. When the pat rix is removed, the stain s (1 leave the depressions. formed either vo untarily, i.- e. merely owing to the shape of the parts in contact, or springs era counter-poise may be provided for that pur- "pose. Of course, Where the shapoof the part as does notallow of letting the stamps (1 form removed,'fro m the same reasonas'before stated, 11. e. want of place, b means of a lug such as g, a specially provi ed lever, a bellcrank lever, or other suitable means may be chosen.

The matrix and the atrix may be furnished with knives, as often times done, but instead of providing the patrix with a fiat knife or flat knives, as usual, I prefer upright knives, such as 0, Fig. 1. Irrespectlve of how the shape of the patrix may be, the upper portion of it can now be completely fiat or horizontal, and the upper die of the press which actslupon that ortion can contact with the upper surface 0 that ortion in the whole extent of same.

- correctly adjusted wlth respect to the lower ones, cooperatilw with respect to the cut practically like the blades of a pair ofscissors.

To prevent the material to be pressed from being torn while being cut I provide the lower knives with oblique surfaces p forming at the same time a kind of guide in case the adjustment of the patrix with respect to the matrix should not have been sufliciently correct. I

What I claim is:

1. As a means for producing, in shaped ortions for hollow bo ies such as employed or dolls, imitations of animals, andthe like, cavities extending into the hollow space of the respective portion at an angle with respect to the open side of the same, the combination with a matrix; a recess in the same, a stamp located in said recess and adapted to be moved in the same in the direction to and from the material under treatment, a patrix fitting into said matrix; a recess in said patrix adapted to receive said stamp, and means for moving the latter into the lastnamed recess, for the pur ose as described. 2., As a means for pro ucin cavities in shaped portions for hollow bo ies, such as em loyed for dolls, imitations of animals an other objects, and the like, the combination with a matrix, a recess in the same, a

. stamp located in said recess and adapted to be moved in the same in the direction to and y from the material under treatment, a patrix fitting intosaid matrix, and a lug of said patrix adapted to enter said recess and to move the said stamp, substantially and for the purpose as described.

As a means for roducing in shaped ortions for hollow bodies such as employed or dolls, imitations of animals, and the like, cavities extending into the hollow space of the respective portion at an angle respect to the open side of the same, the combination with a matrix; a recess in the same, a stamp located in said recess and adapted to be moved in the same in the direction to and from the material under treatment; a patrixfitting into said matrix; a recess in said patrix adapted to receive said stamp,

and means for moving the latter in to the last-named recess; lateral cutting-knives provided at said patrix, counter-knives provlded upon the matrix, and oblique surfaces provided at the inner edges of said counterknives, substantially and for the purpose as described.

4. As a means for producin cavities in shaped portions for hollow bodies, such as employed for dolls, imitations of animals and other objects, and the like, the combination with a matrix, a recess in the same, a stamp located in said recess and adapted to be moved in the same in the direction to and from the material under treatment, a atrix fitting into said matrix, and a lug 0 said patrix adapted to enter said recess and to move the said stamp, lateral cutting-knives provided at said patrix, counter-knives provided upon thematrix, and oblique surfaces provided at the inner edges of said counternives, substantially and for the purpose as described.

5. As a means for producing depressions in shaped portions for iollow bodies, such as employed for dolls, imitations of animals and other objects, and the like, the combination with a matrix, a recess in the same, a stamp located in said recess and adapted to be moved in the same in the direction to and from the material under treatment, a patrix fitting into said matrix, and a lug of said patrix adapted to enter said recess and to move the said stamp, substantiallyand for the purpose as described.

' In witness whereof I have hereunto set my hand in presence of two witnesses.

CARL GEFFERS. Witnesses:

PAUL TEIGHMANN, MAX T111011. 

